Power distribution network cable leakage current on-line monitoring device based on mobile internet technology

Abstract

The invention relates to a power distribution network cable leakage current on-line monitoring device based on a mobile internet technology, which comprises a current acquisition module, a data transmission module and an intelligent diagnosis module, and is characterized in that the current acquisition module adopts an open type CT, is very convenient to install on site, is provided with a cable locking mechanism, and can fasten the CT and a cable and prevent the CT from vibrating; the data transmission module comprises two parts, lora transmission is adopted between the plurality of cable leakage detection modules at the same place and the repeater, and network transmission is adopted between the plurality of cable leakage detection modules at the same place and the background server; the intelligent diagnosis module is mainly composed of an artificial intelligence server deployed at a far end, receives the data of the cable leakage acquisition module, carries out fault diagnosis, and feeds back a diagnosis result to operation and maintenance personnel. The invention provides a power distribution network cable leakage current on-line monitoring device based on a mobile internet technology. On the premise that personal safety of operation and maintenance personnel is guaranteed, power distribution network cable current leakage on-line detection is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of distribution network cable leakage current monitoring, and in particular relates to a distribution network cable leakage current online monitoring device based on mobile Internet technology. Background Art

[0002] With the rapid development of my country's economy and the continuous improvement of urbanization level, while the power industry has made great progress, the scale of the power system has continued to expand, forming a network with many branches and complex connection forms. The distribution network directly serves the end users and is a key link in ensuring the transmission and use of electric energy. It is the decisive foundation for national economic construction and social development. Cables are an important part of power grid equipment. They are the bridge between power supply equipment and power consumption equipment, and play the role of transmitting electric energy.

[0003] However, the following problems are common in the operation of distribution network cables: (1) The working environment of power cables is harsh. Urban power supply cables are often laid directly or in pipes. During operation, cables are easily affected by external factors such as flooding, dragging, and squeezing, causing mechanical damage, which in turn causes insulation defects; (2) Urban power grids are online for a long time. The long-term use of power users and the characteristics of concentrated power consumption during the same period have led to line overload and other working conditions, which further aggravate the decline in cable insulation level; (3) The cable manufacturing process may have potential defects. The contact surface of the cable joint connection hardware may be poorly processed, stripped, the conductor is not properly connected, and the connection pressure is insufficient, resulting in severe heating of the joint and insulation damage. Among them, leakage is a common problem of cables. Leakage is the leakage of current caused by insulation damage or other reasons. Leakage not only consumes electricity, but also may damage electrical equipment and even cause personal injury. The leakage current of the cable is mainly capacitive leakage current, and it is to the ground. Its main impact is that it will increase the voltage at the end of the power supply, which will affect the insulation. There are also high requirements for ground short-circuit protection. The larger the leakage current, the worse the insulation strength of the cable, or the more serious the local defects, and the more likely it is to be broken down and damaged during operation. Therefore, leakage monitoring of the cable is crucial.

[0004] The traditional cable current leakage detection method mainly adopts the method of regular inspection and power outage test, which is easy to cause power interruption and does not meet the actual needs of power production and supply; on the other hand, repeated voltage resistance tests are easy to aggravate the insulation aging of the cable, causing new damage to the cable insulation, which will cause great safety hazards when the cable is put into operation later. Compared with the previous cable offline detection method, the cable is currently developing in the direction of online monitoring. The online monitoring of cable insulation can be carried out when the system is operating normally, that is, the system is not powered off, to ensure the reliability of power supply; in addition, the detection signal is generated by the real-time operation of the system, which can reflect the real-time status of the system, and the detection accuracy is greatly improved. The online monitoring of the cable insulation status can detect the insulation status of the cable at any time, and can predict the possible failure of the cable according to the changes in the cable insulation, so as to give early warning and give treatment opinions to prevent greater accidents, so as to make the power system progress towards intelligence and automation. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an online monitoring device for distribution network cable leakage current based on mobile Internet technology, which can realize online detection of distribution network cable current leakage while ensuring the personal safety of operation and maintenance personnel.

[0006] The present invention proposes an online monitoring device for cable leakage current in a distribution network based on mobile Internet technology. The online monitoring device for cable leakage current in a distribution network comprises three parts: a current acquisition module, a data transmission module, and an intelligent diagnosis module. The current acquisition module adopts an open-type CT, which is very convenient to install on site and has a cable locking mechanism, which can fasten the CT and the cable to prevent the CT from vibrating; the data transmission module comprises two parts, and lora transmission is adopted between several cable leakage detection modules at the same location and a repeater, and network transmission is adopted between the modules and a background server; the intelligent diagnosis module is mainly composed of an artificial intelligence server deployed at a remote end, which receives data from the cable leakage acquisition module and performs fault diagnosis, and feeds back the diagnosis results to the operation and maintenance personnel.

[0007] Furthermore, the monitoring device uses an intelligent communication management machine as a data collection and transmission device in a high-voltage and strong magnetic environment. The intelligent communication management machine is an embedded hardware computer platform with multiple downlink communication interfaces and one or more uplink network interfaces. It is used to collect and aggregate the communication data of all intelligent monitoring / protection devices in a target area, and upload them to the main station system in real time to complete energy data collection functions such as remote signaling and remote measurement.

[0008] Furthermore, the monitoring device provides an RS485 communication port through an intelligent communication management machine, and each port can carry up to 32 instrument devices (for low-voltage comprehensive protection, it is recommended to connect no more than 4 devices to each port); the number of devices carried by each communication port can be ultimately determined based on the communication baud rate of the instrument equipment, the length of the communication line and the customer's requirements for the refresh speed of the communication data.

[0009] Furthermore, the monitoring device is mainly used to measure the three-phase active power of the low-voltage network through the ADW300 wireless meter. It has the advantages of small size, high precision, rich functions, etc., and has multiple optional communication methods. It can support RS485 communication and wireless communication methods such as Lora, 2G, NB, 4G, etc., and adds the current sampling mode of the external transformer, so that users can install and use it in different occasions. It can be flexibly installed in the distribution box to realize the needs of sub-item power metering, operation and maintenance supervision or power monitoring in different areas and different loads. Furthermore, the monitoring device adopts advanced encryption technology and security protocols to ensure the security and privacy of monitoring data and prevent unauthorized access and tampering of data.

[0010] Furthermore, the monitoring device adopts switch signal input mode through switch quantity input, and the instrument is equipped with +12V working power supply inside, without external power supply. When the external is connected or disconnected, the connection or disconnection information is collected through the instrument switch input module and displayed locally through the instrument. The switch quantity input can not only collect and display local switch information, but also realize remote transmission function through the instrument's RS485, that is, "remote signal" function.

[0011] Furthermore, the monitoring device is mainly composed of an artificial intelligence server deployed at a remote end through an intelligent diagnosis module, which uses artificial intelligence and machine learning technology to perform intelligent analysis on the monitoring data, realize automatic detection and early warning of abnormal cable leakage current, and feed back the diagnosis results to the operation and maintenance personnel.

[0012] Furthermore, the monitoring device realizes system integration and management of the monitoring system, including the selection and configuration of hardware equipment, the development and integration of software systems, the installation and debugging of systems, and the operation and maintenance of systems, etc. System integration and management can ensure the stability and reliability of the monitoring system and improve the overall performance and efficiency of the system.

[0013] Furthermore, the monitoring device combines a current acquisition module, a data transmission module and an intelligent diagnosis module together, and finally designs a high-voltage cable leakage current online monitoring device with quick deployment, convenient operation and intelligent diagnosis.

[0014] Compared with the prior art, the beneficial effects are:

[0015] (1) The use of wireless transmission technology enables the monitoring device to realize remote data transmission and remote monitoring functions, thereby realizing real-time monitoring and remote management of cable leakage current without the need for manual on-site inspections.

[0016] (2) Use artificial intelligence and machine learning technology to intelligently analyze monitoring data to achieve automatic detection and early warning of abnormal cable leakage current. The accuracy and reliability of the monitoring system can be improved through analysis and pattern recognition of historical data.

[0017] (3) Integrate multiple sensors (such as current sensors, temperature sensors, humidity sensors, etc.) into the monitoring device to achieve multi-dimensional monitoring and comprehensive analysis of the cable status, thereby improving the comprehensiveness and accuracy of the monitoring system.

[0018] (4) Use advanced encryption technology and security protocols to ensure the security and privacy of monitoring data and prevent unauthorized access and tampering of data.

[0019] (5) This device can aggregate and upload all measurement point data through a gateway, and it has high integration without the need for on-site wiring. It adopts a modular design, and each module uses terminals or wireless connections, which makes subsequent maintenance simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of an online monitoring device for cable leakage current in a distribution network based on mobile Internet technology of the present invention;

[0021] Figure 2 This is the effect diagram of ADW300 of the present invention. DETAILED DESCRIPTION

[0022] The specific implementation manner of the online monitoring device for cable leakage current in a distribution network based on mobile Internet technology of the present invention is described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1 As shown, the online monitoring device for cable leakage current in the distribution network of the present invention comprises three parts: a current acquisition module, a data transmission module and an intelligent diagnosis module. The current acquisition module adopts an open-type CT, which is very convenient to install on site and has a cable locking mechanism, which can fasten the CT and the cable to prevent the CT from vibrating. The data transmission module comprises two parts. Lora transmission is adopted between several cable leakage detection modules and repeaters at the same location, and network transmission is adopted between the modules and the background server. The intelligent diagnosis module is mainly composed of an artificial intelligence server deployed at a remote end, which receives data from the cable leakage acquisition module and performs fault diagnosis, and feeds back the diagnosis results to the operation and maintenance personnel.

[0024] The monitoring device uses an intelligent communication management machine as a data collection and transmission device in a high-voltage and strong magnetic environment. The intelligent communication management machine is an embedded hardware computer platform with multiple downlink communication interfaces and one or more uplink network interfaces. It is used to collect and aggregate the communication data of all intelligent monitoring / protection devices in a target area and upload them to the main station system in real time to complete energy data collection functions such as remote signaling and telemetry.

[0025] After receiving the superior command, the intelligent communication management machine of the monitoring device can forward it to the intelligent series units in the target area to realize the remote control and remote adjustment functions, so as to achieve the goal of remote output of the dispatching command.

[0026] The monitoring device intelligent communication management machine provides RS485 communication ports, each port can carry up to 32 instrument devices (for low-voltage comprehensive protection, it is recommended to connect no more than 4 devices to each port); the number of devices carried by each communication port can be ultimately determined based on the communication baud rate of the instrument equipment, the length of the communication line and the customer's requirements for the refresh speed of the communication data.

[0027] The monitoring device ADW300 wireless meter is mainly used to measure the three-phase active power of the low-voltage network. It has the advantages of small size, high precision, rich functions, etc., and has multiple optional communication methods. It can support RS485 communication and wireless communication methods such as Lora, 2G, NB, 4G, etc., and adds the current sampling mode of the external transformer, so that users can install and use it in different occasions. It can be flexibly installed in the distribution box to achieve the needs of sub-item power measurement, operation and maintenance supervision or power monitoring in different areas and different loads.

[0028] The switch input of the monitoring device adopts the switch signal input mode. The instrument is equipped with a +12V working power supply, and no external power supply is required. When the external is connected or disconnected, the switch input module of the instrument collects the connection or disconnection information and displays it locally through the instrument. The switch input can not only collect and display local switch information, but also realize the remote transmission function through the RS485 of the instrument, that is, the "remote signal" function.

[0029] The intelligent diagnosis module designed for the monitoring device is mainly composed of an artificial intelligence server deployed at a remote end. It uses artificial intelligence and machine learning technologies to perform intelligent analysis of monitoring data, realize automatic detection and early warning of abnormal cable leakage current, and feed back the diagnosis results to operation and maintenance personnel.

[0030] The monitoring device realizes the system integration and management of the monitoring system, including the selection and configuration of hardware equipment, the development and integration of software systems, the installation and debugging of systems, and the operation and maintenance of systems, etc. System integration and management can ensure the stability and reliability of the monitoring system and improve the overall performance and efficiency of the system.

[0031] The monitoring device combines a current acquisition module, a data transmission module and an intelligent diagnosis module together, and finally designs a high-voltage cable leakage current online monitoring device with quick deployment, convenient operation and intelligent diagnosis.

[0032] The online monitoring device for cable leakage current in the distribution network includes a current acquisition module (using an open-type CT), a data transmission module (including LoRa and network transmission), and an intelligent diagnosis module (deployed on a remote artificial intelligence server). After the leakage current signal is introduced through a shielded cable, it is processed by the voltage, overcurrent protection and signal conditioning circuits, and enters the MSP430 microcontroller for processing and calculation, and finally the accurate amplitude of the leakage current is obtained. In addition, the device also supports wireless metering instruments for the measurement of three-phase active power. It has the characteristics of small size, high accuracy and a variety of communication mode options, and is suitable for installation requirements in different occasions. The system uses the GPRS network to realize remote data acquisition and transmission, supports remote control and remote adjustment functions, has a rich protocol library to support the interconnection of different secondary devices, and provides flexible configuration management and software configuration functions, which can meet complex power monitoring and operation and maintenance needs.

[0033] like Figure 1 The dimensions of the modular series are shown below. The models used are ANet-2E4SM, ANet-2E4SM-LR, ANet-M4G, and ANet-M485 (molded case). The LED lights of the 2E4SM device are all red on the upper panel. They flash when there is data processing and go out when there is no data processing.

[0034] The ANet-M4G module, SIM card and ANet-M485 module do not support hot swapping. They need to be powered off and all LED lights off before they can work properly.

[0035] like Figure 2 The ADW300 effect diagram is shown. The ADW300 wireless meter is mainly used to measure the three-phase active power of the low-voltage network. It has the advantages of small size, high precision, rich functions, and multiple optional communication methods. It can support RS485 communication and wireless communication methods such as Lora, 2G, NB, 4G, etc., and adds the current sampling mode of the external transformer, so that users can install and use it in different occasions. It can be flexibly installed in the distribution box to achieve the needs of sub-item power measurement, operation and maintenance supervision or power monitoring in different areas and different loads.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention. A person skilled in the art should understand that the specific implementation of the present invention can be modified or replaced by equivalents, but these modifications or changes are within the scope of protection of the pending claims.

Claims

1. An online monitoring device for cable leakage current in a distribution network based on mobile Internet technology, characterized in that: The distribution network cable leakage current online monitoring device includes three parts: a current acquisition module, a data transmission module, and an intelligent diagnosis module. The current acquisition module adopts an open-type CT, which is very convenient to install on site and has a cable locking mechanism to fasten the CT and the cable to prevent the CT from vibrating. The data transmission module includes two parts. Lora transmission is used between several cable leakage detection modules and repeaters at the same location, and network transmission is used between them and the background server. The intelligent diagnosis module is mainly composed of an artificial intelligence server deployed at the remote end, which receives data from the cable leakage acquisition module and performs fault diagnosis, and feeds back the diagnosis results to the operation and maintenance personnel.

2. According to the mobile Internet technology-based online monitoring device for cable leakage current in distribution network according to claim 1, it is characterized in that: The distribution network cable leakage current online monitoring device uses an intelligent communication management machine as a data collection and transmission device under a high-voltage and strong magnetic environment; the intelligent communication management machine collates and summarizes the communication data of all intelligent monitoring / protection devices in a target area, and uploads it to the main station system in real time to complete the remote signaling and remote measurement energy data collection functions.

3. The online monitoring device for cable leakage current in a distribution network based on mobile Internet technology according to claim 2 is characterized in that: After receiving the superior command through the intelligent communication management machine, the distribution network cable leakage current online monitoring device forwards it to the intelligent series units in the target area to realize the remote control and remote adjustment functions to achieve the goal of remote output dispatching commands.

4. The online monitoring device for cable leakage current in a distribution network based on mobile Internet technology according to claim 3 is characterized in that: The distribution network cable leakage current online monitoring device provides an RS485 communication port through the intelligent communication management machine. Each port can carry up to 32 instrument devices. For low-voltage comprehensive protection, it is recommended that no more than 4 devices be connected to each port. The number of devices carried by each communication port is ultimately determined based on the communication baud rate of the instrument equipment, the length of the communication line and the customer's requirements for the refresh speed of the communication data.

5. The online monitoring device for cable leakage current in distribution network based on mobile Internet technology according to claim 4 is characterized in that: The distribution network cable leakage current online monitoring device measures the three-phase active electric energy of the low-voltage network through the ADW300 wireless meter. The ADW300 wireless meter has the advantages of small size, high precision, and rich functions. It has multiple optional communication modes, supports RS485 communication and Lora, 2G, NB, and 4G wireless communication modes, and adds a current sampling mode of an external transformer, so that users can install and use it in different occasions. It can be flexibly installed in the distribution box to realize the sub-item electric energy metering, operation and maintenance supervision or power monitoring needs of different areas and different loads.

6. The online monitoring device for cable leakage current in a distribution network based on mobile Internet technology according to claim 5 is characterized in that: The switch quantity input of the distribution network cable leakage current online monitoring device adopts the switch signal input mode. The instrument is equipped with a +12V working power supply inside and does not require external power supply. When the external is connected or disconnected, the connection or disconnection information is collected through the instrument switch input module and displayed locally through the instrument. The switch quantity input can not only collect and display local switch information, but also realize remote transmission function through the RS485 of the instrument, that is, the "remote signal" function.

7. The online monitoring device for cable leakage current in a distribution network based on mobile Internet technology according to claim 6 is characterized in that: The intelligent diagnosis module is mainly composed of an artificial intelligence server deployed at a remote end. It uses artificial intelligence and machine learning technologies to perform intelligent analysis of monitoring data, realize automatic detection and early warning of abnormal cable leakage current, and feed back the diagnosis results to operation and maintenance personnel.

8. The online monitoring device for cable leakage current in a distribution network based on mobile Internet technology according to claim 7 is characterized in that: The distribution network cable leakage current online monitoring device realizes system integration and management of the monitoring system, including the selection and configuration of hardware equipment, the development and integration of software systems, the installation and debugging of the system, and the operation and maintenance of the system; the system integration and management can ensure the stability and reliability of the monitoring system and improve the overall performance and efficiency of the system.

9. The online monitoring device for cable leakage current in a distribution network based on mobile Internet technology according to claim 8 is characterized in that: The distribution network cable leakage current online monitoring device combines the current acquisition module, the data transmission module and the intelligent diagnosis module together, and finally designs a set of high-voltage cable leakage current online monitoring device with quick deployment, convenient operation and intelligent diagnosis.

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